施氮量对绿豆生长及干物质积累的影响

Effects of Nitrogen Application Rates on Growth and Dry Matter Accumulation of Vigna radiata(Linn.)Wilczek

在大田条件下研究了氮肥施用量对绿豆株高以及干物质积累的影响。结果表明,较低的氮肥施用量并未对绿豆株高产生显著影响,施氮52.5 kg/hm^2时,在花荚期和鼓粒期显著提高了绿豆株高,但成熟期并未对株高产生显著影响。增加氮肥施用量有利于植物营养器官的生长和干物质积累量增加。从绿豆荚和粒干重变化看,施氮37.5 kg/hm^2时干物质积累量最高,此时籽粒干物质积累量较不施氮肥提高58.74%,较施氮22.5、52.5 kg/gm^2分别显著提高35.20%、14.49%。综合分析认为,37.5 kg/hm^2为当地绿豆最适宜的施氮量。

The effects of nitrogen application rates on plant height and dry matter accumulation of Vigna radiata(Linn.)Wilczek.were studied under field conditions.The results showed that the lower nitrogen fertilizer dosage did not have a significant effect on plant height of Vigna radiata(Linn.)Wilczek..When application amount of N fertilizer by 52.5 kg/hm^2,the plant height was significantly increased at the stage of flowering pod and pellet stage,but stage of maturity stage did not have a significant effect on the plant height.Increasing the amount of nitrogen fertilizer was beneficial to the growth of vegetative organs and the accumulation of dry matter.The dry matter accumulation was the highest when application amount of nitrogen fertilizer by application amount of N fertilizer by 37.5 kg/hm^2,and the dry matter accumulation was 58.74%higher than that when application amount of N fertilizer by 22.5 kg/hm^2,and 35.20%and 14.49%higher than that when application amount of N fertilizer by 22.5 kg/gm^2.Comprehensive analysis showed that the application amount of N fertilizer by 37.5 kg/hm^2 was is the optimal application amount of N for local Vigna radiata(Linn.)Wilczek..